Diffusion models make great images but are slow because they fix noise step by step many times.
Diffusion models make great images and videos but are slow because they usually need many tiny steps.
The paper solves a big problem in fast image generators: they got quick, but they lost variety and kept making similar pictures.
Alterbute is a diffusion-based method that changes an object's intrinsic attributes (color, texture, material, shape) in a photo while keeping the object's identity and the scene intact.